Electrical selective switch.



E. E. CLEMENT.

ELECTRICAL SELECTIVE SWITCH.

APPLICATION FILED LIAB.16,1912.

3 SHEETS-SHEET 1.

W1 IN/555155 N1 "1;.

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E. E. CLEMENT. BLEGTRIQAL SELECTIVE SWITCH.

. APPLICATION FILED XAB.16,1912. 1,105,49 1. Patented July 28,1914.

3 SHEETS-SHEET 2.

W1 TNESSES INVENTOR B. E. CLEMENT.

ELECTRICAL SELECTIVE SWITCH.

APPLICATION FILED HAB.16,1912.

1,1 05,49 1 Patented July 28, 191 1 3 SHEETS-SHEET 3.

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EDWARD E. CLEMENT, OF WASHINGTON, DISTRICT OF COLUMBIA.

ELECTRICAL SELECTIVE SWITCH,

lpee'iloation of Letters Patent.

Patented July 28, 1914.

Original application filed April 18, 190.8, Serial No. 311,388. Divided and thii application tiled March' 16,

1912. Serial No. 684,866- I To all whom it may concern:

Be it known that I, EDWARD E. CLEMENT, a citizen of the United States, residin at Washington, in the District of Colum 1a, have invented certain new and useful 1m provements in Electrical Selective Switches, of which the following is a specification, ref erence being had therein to the accompanyin r drawing.

ly invention relates to electrical switches and has for its object the improvement said switches in certain particulars which will hereinafter ap ear.

The present app ication is a division of my prior application No. 311,388, filed April 12. 1900, in which a system is described and claimed, but not. the switch structure.

I claim the switch structure herein, without regard to the system in whichit is used..

I v invention is illustrated inthe' accom' panying drawings in which- Figure l is a side view of the switch showing a single bank of-contaets and related atria, which in practicemay be multiplied if desired. Fig. 2-is a cross section through a singlehank and-related parts. Fig. 3 is a plan view. Fig. 4 is a diagram of the circuit with which the switch may be usefully em-.

)lOVL'd. I in Figs. 1 to-3\I have showri a single switch mounted in a frame, but obviously in practice I ma employ any desired number of said switc es. Referring to these ligures. S is the switch, having a base-plate a, carrying vertical standards a, connected at the top by a spider 8', having three arms secured to the standards and a central bearing for the up )er end of the vertical indle a. This spin is as shown has its on a pro-' vidcd with depressions, which receive and turn a on the points of center screws, 0, a". hotl i screws being adjustable and provided with locking nuts.

Supported within the frame upon brackots is the circular contact-bank a, comrising upper and lower lntes a anda,connor-ted hyscrews a", an clamping between them the circular scrienoi'contactawith rings of interposed mu ilation. These spring! are in sets, each set appertaining to one particular line. and comprising the following: An

upper individual 8 Win}: a

l a pair 0 ll:-

f l or test ripitpur log circuit linc prlngs a". a; a par of trunk talking circuit springs 8, s and a air .of lme-number-signal springs, s" an s".

Within the .ringof contacts the spindle s sprovided .with a gain or annular notch 8 m which lie the edges of a pair of plates, 8 and a", screwed to the iron head of an electromagnet a", which is wound on a. brass or iron tube surrounding the spindle. The spindle itself forms the core of this magnet, and passes through an opening a in the armature-c thereof which is pivoted to the iron jacket of .the .magnet at s, and carries the ,bell-crank-lever-arm 8, whose upper end extends through a slot in the bottom of the tube a" and a registering slot in the pluga" of insulating material. As the armature .is,p1illed up itthrows out the plug a" so that it passes between any pair of s rings a, a, to which it is opposite. Att e sametime, it withdraws the pin 8" from itsnormalresting place in a notch in th disk 8", which;is rigidly secured on the spindle a.

In order to.maintain the armature down and the plug a retracted, as well as to furnish means for testing-the.line-contacts a,

I, provide the strong spring .8 secured at its lower .end at ;the angleof the bell-crank armature lever, and steadied at its up er end by bein perforated so that the pug tube passes rou h it. A companion spring a" constitutesa -s iding contact which is in constant engagement with the trunk ring, a", and these two springs s -and a. are connected to two separ te windings-of the magnet ak, the inner ends of both of which are groan ed on-theegpindle. The first windmg, being conn ed with the spring a" to es current when that s ring'comes on a calling contact.- This pu ls up the armature stops the rotation of the magnet, and at the same time throws-out the plug a" between the springs, 8", a" "of-the-set'cor -responding to.the calhn line, connecting -the contacts a", a of t e trunk thereto.

The trunk contact a" takes current-at this time controlled by one of the trunk relays, and hence as long as that trunk relay remains active current asses; through .the ring a", the-spring a, and the second winding of the magnet to theapindle'and round. The trunk rela is controlled by am calling subscriber, an as it becomes actire the subscribers line cut-oil relay is also energized, so that the line springs? becomes dead. and at the same time the jacks of the subscriber on the telephone switchboard have their potentials raised in order that they may testbusy.- I

I eferring to Fig. 4 a subscribers line is shown at 1-2, equipped with the ordinary substation telephone set and in addition thereto with a switch If a thermostat T and a burglar alarm B. 'lhe line terminates on the contacts of a cut-off relay at the central ofiice, through which the two sides of the line are normally connected to signaling relays M and M respectively. When the line is grounded the relay M becomes energized and raises -the potential on the test contact (or contacts where several switch banks in multiple are employed}. When the subscribers receiver is remove fromthe hook however for ordinary tele honic conversation, both relays M and are enerized, and the switch S remains unaffected.

i and R are trunk relays in the battery circuit at the central oilice, and R is a signaling relay at a si al receiving station.

t is to be un erstood that while the description and illustration herein are confined to a single unit switch, this unit may be multiplied into groups or group units, having a common driving shaft 8'. -For example, in serving a group of one hundred subscribers lines, it may be desirableor neccessary to have-morethan one trunk and more than one switch, the lines being multilied into the banks of the several switches. n such 'case the construction of Figs. 2 and 5 would be repeated, sets of Lanka and operating magnets being located vertically over eac other, so that the common spindle or shaft 3' would pass axially through all of them. With such an arrangement, the test wipers a" of the several switches would all be driven around simultaneously, and in order to revent interference, whereby two trunks might become connected to the same line, the collars a" should be set with their 0 enings to receive the pinsa" an arly displaced from each other. this will be to have the wipers a" of the severalswitches follow each other over the vertically recurring multiples of the same line, so that the same line would-be tested as many times in the course of one rotation of the spindle c asthere ate switch units drive by said spin e.

It onld also be observed in closing that the usefulness of this switch is not'oon'flned to a fire orem loyed-w erever so-called line finders or testing selectors areroquised'. I

Having thus described my inventionwhat i. I claim and desire to secure by Letters Pet ent is:- v

1. An automatic selector switch compris- The e ect of.

- alo lice system, but that it may be from group to group of said contacts and to effect the 006 eration of the same, and selectively control ed actuating means for the operating member ada ted to cause the operating member to e ect the coiiperation of the contacts of any determined one of said .groups after said group has been reached by the operating member in its movement.

3. An automatic selector switch comprising a row of contacts, a cooperating circuit closing member adapted to effect the closure of circuits through said contacts and to be moved past said contacts normally disengaged therefrom and actuating means for the operating member adapted automatically to cause the operating member to efiect circuit connections through any determined one of said row of contacts.

- 4. An automatic selector switch comprising in combination, a pluralit of 'rroups of terminal contacts, a plug member a apted to eflject circuits through the contacts of said groups, and adapted to be moved automaticall past said groups of contacts, and selectivey controlled actuating means adapted automatically to operate the plu member to effect circuit connections throng any determined one of said groups of contacts. I

5. An automatic selector switch comprising in combination, a row of contacts, an operating member for the same. adapted to be moved along said row, electromagnetic actuating means for causing the operating member to efl'ect circuit connections through any desired contact of the row, and a test wiper moving with the operating member therow ofooiitacts, and controlling the circuit of the said actuating means.

-' 6. An automatic selector switch comprising a circular series of contacts, a circuit closing member adapted to effect the closin of a circuit through any individual contact, means for rotating said member ast said contacts, and, selectively controlle electroma etioa'ctuating means adapted to move sai member intooperative en agement with an ,doteaminodcontact of sai series.

'Z AIIJQutomatio-XseIector switch comprising 'a-ci tcular series of contacts, a radially movahlel'oirouit closing member adapted to efledt the closing of a circuit through amt-normally connecting the wipcr.-\vith, said,

said contacts, and electromagnetic actuating individual contact, means for rotating said member past said contacts, and selectively controlled' electromagnetic'actuating m'e'a'n'sad'apted to move said member into operative engagement with any determined contact; of said series.

8. An automatic selector switch compris ing a row of contacts, a circuitclosing'member' adapted to efiect ac'rrcuitthrough any redetermined one of said contact's'movable into and ont of engagement therewith, and adaptedfor' movement past said row, electroma etic actuating means for moving said circuit clos'n'g member into the engagement aforesaid, and circuit connectionstherefor controlled throughindivi'dual contents of said row;

9. An automatic sel'cctofswitch comprising a row, of contacts, acircpit closing meniber dapted to efl'ect a circuit through any n-cdetermined one of said contacts movable into and out of engagement therewith, and adapted for movement past said row, electromagneti actuating means for, moving said circuit closin member into the engagement aforesaid, said means having two sefparate windings, circuit connections to one 0 said windings controlled through the contacts of the row for efl'ccting initial operation of said circuit closing member, and means whereby the second winding may be energized to hold the circuit closing memher in actuated position.

10. An automatic selector switch comprising a row of contacts, a circuit closing member adapted to effect a circuit through an n-edctermined one of said contacts movab e into and out of engagemeht therewith, and adapted for movement past said row, electromagnetic actuating means -for moving said circuit closing member into the engagemcnt aforesaid, said means having two sepa rate windings, through the energization of either of which said circuit closing member may be moved to effect the closure of a circuit through any predetermined one of said contacts.

11. An automatic selector switch comprising a row of contacts, a movable supportin member, a circuit.closing member normall clutched therctoand movable thereby along saidrow 0! cont said circuit closing member being adap to eflect circuit con-v nections through any predetermined one of mcans'for said circuit closing member n'daptod simultaneously to unclutch said member from its supporting part and. move the same into operative engagement with the said contacts.

.12. An automatic selcctor'switch comprising a row of'qontucts, a test wiper, a support ,for the sameadabted to move said wiptl' over the contacts successively, a clutch sn port, and an electromagnet controlling I said clu'toliand liayi'ngan energizing circuit controlled through said test wiper.

ing' arow of contacts, a spring. test wiper, a movable member'ad'apted to support said wiper' and move the same along said con- "tactsg-an electromagnet controlling the movemerit-of saidwip'er by said support and hav- 1 ing an armature biased to retracted position 'by' the spring of said wiper. y 3

14. A selector switch comprisiri the following instrumentalitiesf a circu jar series of line'terminals, a central s indie, anelec- .tromagnet axially supported on' said spindle to turn thereon, an armature for said magnet, a plug carried thereon and adapted to reciprocate in a radial direction with respect tothe spindle, and a. connection be- -tween' the armature and said lug whereby the plug is thrown out to e set a change v in theterminal connections when the armature is attracted.

13. An automatic selector switch compris- 15. A selector switch comprising a circular series of contacts, a central splndle constantly driven, anvelectromagnet carryin a radialreciprocating pin and itself anally journa'le on the spin Is, an armature for said magnet ha'vin a lever controlling ;the movement of the p ug, and a clutch for \c onnectin the magnet to thespindle also controlle by said armature, whereby u on energization of the magnet the same wili be disconnected from the spindle and its plug will be thrown'out to engage the opposite contacts.

16. A selector switch comprising-the following instrumentalities: a circular series of contacts, a central spindle of magnetic material an electromagnet journaled upon said spin e, and carrying aradial reciprocating ug, an armature for said magnet having a ever connection with said plug, and a clutch connection with the spindle, said s indie forming the core of the magnet, and t e armature serving when attracted to mechanically disconnect the latter so that it will remain stationary and at the same time its plug will be projected mto engagement with the op osite contacts.

17. 'lector switch comprising the fol lowing instrumentahties: a bank containing a plurality of seps or fixed or passive contacts, a driven spindle centered'with respect to said contacts, a test wi or or active conthat carried on said spin e, a plug on the 'spindle in fixed antgular relation to the test wiper, and an o eclromagnet controlling said plug, ,andhaving its windings controlled through the test wiper.

18. selector switch comprising the following inslrumcntu ilics:'a bank containing a phu-ulitv of sets of fixed or passive contucts, each 'setcomprising a plurality of switching contacts, and a test contact, a

. ver, a test :wiper and a' switching contacts of the' respective sets a test wiper or active contact cooperating'wlth the test contacts in the bank, and an electro magnet controlling said ping and having its windings connected to said test wiper so as to be-energized by. current supplied therethrongh;

19. A selector switch comprising the following instru'mentalities: a bank of contacts containing a plurality. of fixed or passive sets, each set appertainiiig circuit ossible of selection by the switch, and eac set consistin of switching contacts adapted .to be spread y the plug a'test contact, andtwoicontrol contacts, a. driven spin: dlecenteredwithregard to the bank', a reciproc'atingplug carried on said'spindle, an armature: lever controlling said plug, an electromagnetcontrolling said armatnre lewipers connected to different portions of the windings of said clectromagnet, and local circuit connection for said control'contacts.

20. A selector switch comprisin the following instrumentalities: a. curved bank of 40 m of this patent my be obtained. for Mo cents each, by addressing to a determinate pair'lofc'ontrol' .fixed or passive contacts divided into sets,

each set used, together and with a particular circiiit tojbeselected by the switch, a pair of switching contacts in each set and a. pair of common cooperating contacts extending into all the sets, with test-and control contacts with regard to the bank, a eating plug carried on t adapted to coiiperatewith the switching contacts; an electromagnet, a bell crank .armaalso in eacliset, a driven spindle centered radial reciprohe spindle and tnreand-lever therefor, the end of said lever 5 engaging said plug test'and control wipers connected-to said electromagnet. adapted to engage the test and control contacts in the hank, andfcircuit connections whereby a cur- 5 in presence 0 two witnesses.

EDWARD E. CLEMENT.

Witnesses:

J .-P. Tnmox, Janna H. Mann.

the commissioner rate-nu,

Wtlhlnlton, D. O." 

